package com.example.administrator.handlermessageprogress;

import android.os.Message;
import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;
import android.os.Handler;
import android.view.View;
import android.view.View.OnClickListener;
import android.widget.Button;
import android.widget.ProgressBar;

public class MainActivity extends AppCompatActivity {
    ProgressBar bar=null;
    Button startButton=null;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
        bar=(ProgressBar)findViewById(R.id.bar);
        startButton=(Button)findViewById(R.id.startButton);
        startButton.setOnClickListener(new ButtonListener());

    }
    class ButtonListener implements OnClickListener{
        public void onClick(View v){
            bar.setVisibility(View.VISIBLE);
            updateBarHandler.post(updateThread);
        }
    };
    Handler updateBarHandler=new Handler(){
      public void handleMessage(Message msg){
          bar.setProgress(msg.arg1);
          updateBarHandler.post(updateThread);
      }
    };
    Runnable updateThread=new Runnable() {
        int i=0;
        @Override

        public void run() {
            System.out.print("Begin Thread");
            i=i+10;
            Message msg=updateBarHandler.obtainMessage();
            msg.arg1=i;
            try{
                Thread.sleep(1000);
            }catch(InterruptedException e){
                e.printStackTrace();
            }
            updateBarHandler.sendMessage(msg);
            if(i==100)
            {
                updateBarHandler.removeCallbacks(updateThread);
            }

        }
    };

}
